Improved clay-pulverizer and stone-separator



,n n. i efmtatm aient (time. dei* y ay .FRANCIS H. SMITH, OF BALTIMORE, MARYLAND. Letters Patent No. 8;? ,716, dated Ma/rch 9, 1869.

IMPRov'nD CLAY-PULvERIzn AND sToNE-SEPARAT'OR The Schedule referred to in these Letters Patent and making part of the same.

To all whom fit ma/ 1; concern Be it known that LFRANCI'S H. SMITH, of the city and county of Baltimore, State of Maryland, have invented anew and improved Method or Machine for Pulverizing Clay, and at the same time Separating it from Stones; and I hereby declare the following to be a full, clear, and exact description thereof, reference being made to the accompanying drawings, making a part thereof, to enable others to make anduse the saine. Y Many places abound in excellent clay, but of no value for brick-making and yother purposes, because of the gravel and small stouesthat are mingled with it. No

eort has been made, to my knowledge, to obviate this difficulty by machinery. For this purpose is the claypulverizer auf] stone-separator. Views of this are given in iigs. 10, 11, 12, and 13.

Figure 10, alongitudinal section through the frame.

Figure 11, a section in line with the friction-rollers.

Figure 12, an' end view.

Figure 13, a plan or top view. Y

The main shaft S passes through the centre of the circular screen V, and through the entire length of the machine, resting on the bearings s, and has a drivingpulley, t, keyed on one en d. The other end is provided Iwith a spur-pinion, q, which transfers its mot-ion to the circular screen V, iirst'by the spur-wheel fr to the counter-shaft el, thence from the pinion c to 'spur-wheel u, which is fast on rim of circular screen V, and thus keeps it in motion. l

The circular screen is supported and kept in its position by four friction-rol1ers, p, at each end of the screen. r

Each of the gears reduces the motion one-sixth consequently if the main shaft S moves three hundred andv sixty revolutions per minute, the screen will have but thirty, which is sufficient.

The frame is to be bolted to the joists beneath the second story ofthe building.

If very large stones were admitted into the screen, they would break the cutters. To prevent thisl is the grating X, with openings one inch and three-quarters square, placed even with the surface of the floor, 0n which the clay is thrown from the cart.

'lhe clay and smaller stones rst pass through thel grating X, thence through the spouts U into the screen V,where they come in contact with the cutters l as they revolve, which are keyed on to the main shaft S. By this the clay is instantly reduced to dust, and passes through the screen V, the mesh of which is three-eighths by onehalf inch, into the clay-pit, and the stones fall through the chute, 'at the further end of the screen, outside of the building.

What I claim, and desire to secure by Letters Patent, .is-

The clay-pulveiizer and stone separator, consisting of the revolving screen V, upon friction-rollers p p pp, with. its rotating cutters T, upon shaft S, said screen and shaft heilig moved at different speeds by means of the gearing, as shown, the grating X, conductor UV, and discharge-spout O, all arranged together, and 0pe'rated substantially -as and for the purpose herein set forth.

The above specification of my invention signed by me, this 25th day of April, 1868.

, FRS. H. SMITH. Witnesses:

WM. H. BAYZAND, E. HovEY. 

